ARM: tegra: Use symbolic names for gr3d clocks

Commit 05849c93 (ARM: tegra30: convert
device tree files to use CLK defines) updated the Tegra30 device tree to
use symbolic clock names but forgot to update this node.
Signed-off-by: Thierry Reding <treding@nvidia.com>
Signed-off-by: Stephen Warren <swarren@nvidia.com>

arch/arm/boot/dts/tegra30.dtsi

@@ -136,7 +136,8 @@ gr2d {
 		gr3d {
 			compatible = "nvidia,tegra30-gr3d";
 			reg = <0x54180000 0x00040000>;
-			clocks = <&tegra_car 24 &tegra_car 98>;
+			clocks = <&tegra_car TEGRA30_CLK_GR3D
+				  &tegra_car TEGRA30_CLK_GR3D2>;
 			clock-names = "3d", "3d2";
 		};